Blade-holder.



A. L. HATFIELD.

BLADE HOLDER. 7 APPLICATION FILED DC.5, 1913.

1,171,390. I r j Patented Feb.8,1916f WITNE88E3ZL N INVENTOH. L '2 v I L mom/Er.-

THE COLUMBIA PLANOGRAPH 430., WASHINGTON, D. c. I

entree s'mr'ns PATENT oiirion.

ANDREW IJ. HATFIELD, OF NEWARK,.NEW JERSEY, ASSIGNOR TO HYFIELD MANUFAC- TUBING COMPANY, vA CORPORATION OF NEW YORK.

BLADE-HOLDER.

Patented Feb. 8,1916. 1

Original application filed September 2'7, 1913, Serial No. 792,077: Divided and. this application filed. December 7 I v 5, 1913. Serial No. 304,787.

To all whom it may concern:

' Serial Number 792,077 filed September 27, 1913, of which this present application 1s a division.

The objects of this invention are to provide a blade holder adapted to receive blades of different makes; to provide resilient jaws for clamping blades of varying thickness; to press the jaws together by means of a cam; to prevent wedge-like blades from slipping in said jaws; to admit transverse rocking ofsaidblade holder; to secure simplicity of construction and operation, and to obtain other advantages and results as may be brought out in the following description.

Referring to the accompanying drawings in which like numerals of reference indicate the same parts throughout the several views, Figure 1 is a perspective view of a blade holder embodying my invention; Fig. 2 is a longitudinal sectional view through the same showing a blade clamped in position thereby; Fig. 3 is a detail'p'erspe'ctive View of the cam and lever detached from" the holder; Fig. 4: is a cross-sectional view on line AA of Fig. 2; Fig. 5 is a crosssectional view similar to Fig. 4, showing the mounting for said holder; Fig. 6 is a crosssectional view similar to Fig. 2 showing a tapered blade clamped thereby and the utilization of a back support to maintain a constant projection of said blade, and Fig. 7 is a sectional view through the holder and back support in the plane of the blade.

In the specific embodiment of the invention illustrated in said drawings, the reference numerals 1, 1 indicate a pair of jaws normally held apart at their free ends by their own resiliency or otherwise and secured at their other ends to a handle 2. A suitable aperture 3 is provided through the handle about half way of the length of the holder whereby the holder may be swiveled upon a pivot pin 4: or the like (see Fig. 5)

- forming part of the machine towhich the holder is to be applied, and it will of course be understood that when the blade holder is mounted upon such a pivot pin, the jaws 1, 1 project toward the'grinding element and will apply a blade 5 carried between themselves to said grinding element. Longitudinally of'the handle, the aperture 3 is preferablyof uniform width so as to fit the pivot pin nicely, but in transverse cross sec tion the opening at either end of the aperture is of greater extent than at the center (see Figs. 4 and 5). In this manner, the blade holder is adapted to twist a limited amount about itsown longitudinal axis and swing up and down but not sidewise. This enables the blades to readily accommodate themselves to the grinding element so that the grinding element-always acts upon the blade in a uniform manner. I

The jaws l, 1 preferably are formed each from a piece of sheet metal having at its outer end a lip 6 to grip a blade and an offset middle portion 7 spaced from the corresponding' middle portion of the other jaw,

and a hollow end 8 adapted to fit over the inner "end of the handle and be riveted or otherwise secured thereto as at9. Extending upwardly through the middle portion 7 "of the jaws, with the closed connecting portion 10 of itselfunderlying the bottom one of said jaws, is a U-shaped bracket llthe ported between said free ends is a cam 12 having a handle 13 for rotating the same and for forcing the jaws together. It will be understood that the handle 13 is preferably arranged to swing in a vertical plane through the holder and when down against pin l l'extending through the cam and projecting at either end into suitable holes in the U-shaped bracket, a screw 15 in the cam engaging the pin to prevent removal of the same. In Figs. 6 and 7 I have shown a wedge shaped blade 16 clamped between the jaws,

'freelends of which pro'trude'a distance above the upper one of said jaws. Pivotally supin between the jaws. .10

and in order to prevent such a bladefrom edging inwardly toward the handle end of the holder, I provide a back support 17 adapted to be positioned betweenthe jaws intermediate of their outer ends and the U-shaped bracket and notched at its middle portion on one edge as at 18 so as to take around the arms of the U-shaped bracket hollow the opposite or front edge of this back support to correspond to the curvature of the head of the blade.

It will be understood that in operation, a blade is inserted between the jaws of the holder and the cam revolved to clamp the jaws toward the blade, gripping it securely. The holder is then put in the machine, being inserted between a pair of lugs 19, 19 carrying the pivot pin 4. The pivot pine is then pushed home through the aperture 3 in the blade holder, which, due to the peculiar shape of the, aperture, allows the blade toadjust itself tothe grinding element.

Having thus described the invention what I claim is:

1. A blade holder comprising in combination with a'pair of opposite jaws adapted to clamp a blade between themselves, a handle extending from said jaws having a transverse aperture adapted to receive a supporting pin and substantially parallel to the biting ends of said jaws, said aperture being enlarged at its opposite ends both upward and downward with respect to the plane of thejaws and saidenlargement increasing from the center of the handle to the opposite ends of the aperture, wherebytheh older may rock transversely upon the supporting pin and is prevented from movement longitudinally of the handle.

2. A blade holder comprising in combination with a pair of opposite jaws adapted It is preferable to.

to clamp a blade between themselves, a bandle extending from said jaws having a transverse apertureadapted to receive a support ing pin and substantially parallel to the free ends of said jaws and varying in size from the center of the handle to the opposite ends of said aperture whereby the holder may rock transversely upon said supporting pin and is prevented from movement longitudinally of the handle.

3. A blade holder comprising in combination with a pair of opposite jaws adapted toclam-p a blade between themselves, a han dle extending from said jaws having a transverse aperture adapted toreceive a supporting pin and substantially parallel to the biting ends of said jaws, said aperture being of uniform width in planes extending through the handle longitudinally and of greater width at the ends than at the center in a plane transverse to the handle, whereby the holder may rock. transversely upon the supporting pin and is prevented from movement longitudinally of the handle.

4:. In a blade holder, the combination of a pair of clamping jaws, members extending Copies of this patent maybe obtained, for five cents each, by addressing the Commissioner of Patents,

' Washington, I), G. i 

